Without solid understanding of God's revelation of Himself in Scripture, how can we be sure that the spiritual influence we sense (e.g. changes in emotions, or "convictions") is truly from God?
Therefore, to avoid misguided reliance on the Holy-Spirit, study the Word of God diligently!
One may say, "I trust God, and Holy Spirit is with me!"
However, the Spirit actualises the fruits of our prayer and study, He does not replace it.